diff --git a/lib/sync9.f90 b/lib/sync9.f90
index 4f06fe029..f831292d7 100644
--- a/lib/sync9.f90
+++ b/lib/sync9.f90
@@ -61,8 +61,8 @@ subroutine sync9(ss,tstep,df3,ntol,nfqso,sync,snr,fpk,ccfred)
      endif
   enddo
   ave=sum/nsum
-  snr=10.0*log10(sbest/ave) - 10.0*log10(2500.0/df3)
-  sync=sbest/ave - 2.0
+  snr=10.0*log10(sbest/ave) - 10.0*log10(2500.0/df3) + 2.0
+  sync=sbest/ave - 1.0
   if(sync.lt.0.0) sync=0.0
   if(sync.gt.10.0) sync=10.0
   fpk=(ipkbest-1)*df3
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 8bbcb44d4..454b5063e 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -746,6 +746,8 @@ void MainWindow::decoderFinished()                       //decoderFinished
     ui->decodedTextBrowser->append(line);
   }
   f.close();
+  ui->DecodeButton->setStyleSheet("");
+  decodeBusy(false);
   if(m_loopall) on_actionOpen_next_in_directory_triggered();
 }
 
@@ -831,6 +833,8 @@ void MainWindow::freezeDecode(int n)                          //freezeDecode()
 
 void MainWindow::decode()                                       //decode()
 {
+  decodeBusy(true);
+  ui->DecodeButton->setStyleSheet(m_pbdecoding_style1);
   jt9com_.newdat=1;
   jt9com_.nagain=0;
   jt9com_.nfqso=g_pWideGraph->QSOfreq();